The Sikorsky S-1 was the first fixed wing aircraft design by Igor Ivanovich Sikorsky, a Russian-American aviation pioneer in both helicopters and fixed-wing aircraft, first success came with which aircraft?
S-2
-1
Section::::Abstract.
Sikorsky S-1
51212863
-1
Section::::Abstract.
Sikorsky S-1
51212863
-1
Section::::Abstract.
Igor Sikorsky
199513
-1
Section::::Abstract.
Igor Sikorsky
199513